Hermetically-sealed package and method of making the same.



W. VAN LOENEN.

' HERMETICALLY SEALED PACKAGE AND METHOD OF MAKING THE SAME.

APPLICATION FILED OCT-18.19.

Patented Ogt. 15, I918.

Va/zZoeflerz l W 1 I g 1 In m M 9 3 1 5 .m F A Z WILLIAM VAN LOENEN, OF LOS AN GELES, CALIFORNIA.

HEBMETICALLY-SEALED PACKAGE AND METHOD OF MAKING THE SAME.

1,281,722. Specification of Letters Patent.

Patented Oct. 15. 1918.

Application filed amber is, 1917. Serial in. 197,869.

liable to injury by the transference of mois-' ture or other. substances to or from the same.

An object of this invention is to provide a cheap, effective and thoroughly sanitary means for perfectly conserving substances that are likely to deteriorate from the action of air or moisture or of bacilli or bacteria, and by means of this invention and discovery I am able to produce a cheaper package for this purpose than has heretofore been produced to the same end, and to produce the same with eat ease and convenience. It is commo y known that practical oil, air. and water-tight packages may be made of metal and also of glass but that such packages are more or less heavy and rigid and are likely to be ex ensiveif made of metal and frangible if ma e of glass.

An object of this invention is to provide a water, oil, and airtight package of perfect character and. minimum weight, which is not fragile or likely to be easily ruptured, and which is peculiarly adapted for sanitary packages of soft cheese-like products and also of other substances for the market.

In this invention and discovery I employa combination with tin foil of sodium silicate and paper, the paper being. united to the tinfoil by the sodium silicate and forming a practically unitary envelop which is. wrapped upon the article to be protected,

the joints throughout being filledand sealed by the silicate of soda;and the silicate of soda, paper and tin foil completely enveloping the'article or substance to be protected.

An object of the invention is to provide a cheap sanitary package free from objectionable odors and adapted to prevent f the passageof any gases, odor, flavor or aroma to or from the enveloped substance so that packages of cheese, coffee and other substances having an odor or aroma may be stored in any suitable chamber, as in a food closet or a refrigerator with other substances, as butter or milk, for instance without any hability of contaminating or being contamlnated by odors, aromas or efiluvia from other contents of the chamber.

The package is adapted for putting up fruit such asraisins, currants, dates and food products which may lose aroma or flavor, or. which may be contaminated by communlcation with odor or bacteria laden atmospheric air.

It is understood that cheese and like substances when fiiacked in this package must be kept at suc temperature as will prevent the formation of gases. Otherwise the 7 natural action of the contents of the package at any heat calculated to produce such changes willbe likely to occur ust the same as though the substance were inclosed air tight in glass or tin.

object of the invention is to make pro- VlSlOIl for rapidly and conveniently preparing a sodium silicate coated sheet for receiving the package to be enveloped thereby. Other objects, advantages and features of novelty may appear from the accompanying drawings, the subjoined detail description and the appended claims.

In the accompanying drawings F gure 1 is a perspective view of a package m the first stage of manufacture in accordance with this invention, a portion of one side being torn to expose the wrapped article, and a fragment of the liquid glass coated paper sheet bein shown ready for application to complete 516 package.

Fig. 2- is a transverse sectlon of the completed package indicated at X Fig. 1.

Fig. 3 1s a broken perspective view of the completed package. v

Fig. a is an enlarged fragmental section more clearly showing an external coating of sodium silicate.

Fig. 5 is an exaggerated fragmentary sec- .tion analogous to Fig. 2 with paste-board carton.

' Fig.6 is a reduced end elevation of a coata a represents a body of pimento cheese forming the article to be wrapped.

1 is an inner sheet of tin foil or the hke, 2 is an outer sheet of paper or the like, 3 is the sodium silicate bond uniting the sheets. The sodium silicate is available for use in the form of a fluid paste. In practice a body a of the substance to be preserved is first wrapped in the tin foil sheet l. Then the paper sheet 2 havin one surface coated with the fluid sodium s1 icate 3 is. applied withsuch surface inward on the outside of the tin foil package which is then immedlately of t e a er wrapper thus formed are folded over a iid before they are so folded over, fluid sodium silicate is apphed to all the exwragped in said coated sheet and the ends posed edges of all the folds where the same.

are to contact with the package walls so as to entirely close the envelop thus formed and make it integral. and practlcally seamless. 1

The sodium silicate thusforms an impermeable coating for the tin foil, and an impermeable bond between the tm fo1l mne'r 'sheet of the package and the paper outer sheet.

' an integral structure havin a paper coat.

If desired to protect e outside paper coat from the effects of moisture andt0 doubly seal the package, an external coat1ng 4 of silicate of soda may be apphed which quickly loses its fluid consistency and forms aflexible glass coat.

After the packages have thus been produced they may be inclosed in pasteboard cartons 5 or in sheet metal bbxes or other .contrivances to protect the walls of the package against injury from rough-handling or sharp-pointed instruments. 0

It is understood that the mventaon 1s broad enough in scope to include a packsife composed of an inner envelop of meta 1c sheet material and an outer envelop of fibrous sheet material formed upon the inner envelo and bonded thereto by s1l1cate of soda whic entirely envelope the mner mvelop; the two envelops bemg bonded together soas to constitute ractlcally a smgle envelop, though form success1ve l It is important that the sodium cate board 6 is provided with a raised block 7, Y

and-behind said block, with a glass surface 8. The operator, standing in front of the block and board and reaching over the block, will apply a coating 9. This is done of fluid sodium silicate to the glass surface 8, and will then coat each sheet just before using the same, by applying such sheet with one face downward upon the sodium silicate coating 9, and then immediately applying force to an edge of the sheet to pull it away from the glass surface, thus stripping'the sheet from oil the coating 9 by takmg hold of the farther corners 10 of said sheet and drawing the sheet over the corner 11 of, the raised block and thus bringing it coated side up, onto the top face 12 of the block; whereupon the package 1, previously formed, will be laid on the sodium silicate coating 3 of the coated sheet of paper 2. Thereupon the wrapping will be performed as above described. v

By this last described step in the process of preparing this package it is made possible to rapidly coat the sheet evenly and smoothly wit sodium silicate, without smearing the surface that is to be outside when the-package is completed.

, I claim 1. A ackage comprising a wrapper of tin foil inc osing a substance to be preserved and an outside wrapper of paper united to the tin foil by sodium silicate and having its ends folded and sealed air-tight with material adapted to prevent the passage of moisture through the joints.

2. The method set forth of producing a package which consists in first forming an inclosed inside the package, then forming a second envelop of sheet material inclosmg the first envelop and bonding the outer engglop to the inner envelop'by silicate of so- 3. The method set forth of su plyin the coated sheet for wrapping a pacEage, vghich 4. The method set forth of producing a ackage which consists of wrapping m a tin oil wrapper a body of a substance to be reserved; coating one surface of a sheet 0 pa-.

1' with sodium silicate; wrapping the soium silicate coated paper entirely around envelop of sheet material about a'body to be aeemaa Q the tin foil enveloped package and allowing and the tin foil wrapper of the package tothe sodium silicate to bond the paper and gether at the ends of the package. 10

the tin foil together; folding the ends of the a In testimony whereof I have hereunto set paper at the ends of the package and coatmy hand at Los Angeles, California, this 5th 5 ing the exposed edges of the folds with soday of October, 1917.

dium silicate Where the same are to contact WELIAM VAN LOENEN.

with the pacltage walls, then such edges are Witness:

pressed home, thereby bonding the paper Jem R. TOWNSEND. 

